Investigating the Flow Behavior of Coating Solution in Porous Media for Die Coating Process
碩士 === 國立臺北科技大學 === 化學工程研究所 === 102 === In the coating process of fiber reinforced plastic (FRP), it was found that different types of coating methods had different effects on the imbibition of coating solution. In this study, the flow behavior of coating solution in porous media for the slit die an...
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ndltd-TW-102TIT050630282019-05-15T21:42:32Z http://ndltd.ncl.edu.tw/handle/6898hk Investigating the Flow Behavior of Coating Solution in Porous Media for Die Coating Process 模具式塗佈對塗液在多孔布膜中流動行為之研究 Li-Rong Chen 陳禮榮 碩士 國立臺北科技大學 化學工程研究所 102 In the coating process of fiber reinforced plastic (FRP), it was found that different types of coating methods had different effects on the imbibition of coating solution. In this study, the flow behavior of coating solution in porous media for the slit die and the slot die in the coating process was numerically investigated, firstly. The Finite Difference Method FLOW-3D commercial software was utilized to analyze the build-up pressure in the dies and understand the imbibition phenomenon of coating solution in porous media. It was found that the build-up pressure in the slot die is much greater than the slit die, and imbibition rate can be significant increased and reducing the required time to reach the complete saturation. In general the required saturation time of the slot die coating can be greatly shorted to one tenth of the dip coating required. To analyze operating conditions effect on the coating width and thickness, a 3-D model was constructed, and the simulation data were transformed in dimensionless groups. It was found that when the ratio of inertial force/viscous force (Reynold number) to viscous force/tension force (Capillary number) was smaller than 500 and 450 for numerical computation and experiment, respectively, the dimensionless width W* was less than one. This means the coating solution can not completely cover the width of the slot die. This critical ratio can be used as a reference in scale-up production lines. Yuan-Yuan Su 蘇淵源 2014 學位論文 ; thesis 85 zh-TW |
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碩士 === 國立臺北科技大學 === 化學工程研究所 === 102 === In the coating process of fiber reinforced plastic (FRP), it was found that different types of coating methods had different effects on the imbibition of coating solution. In this study, the flow behavior of coating solution in porous media for the slit die and the slot die in the coating process was numerically investigated, firstly.
The Finite Difference Method FLOW-3D commercial software was utilized to analyze the build-up pressure in the dies and understand the imbibition phenomenon of coating solution in porous media. It was found that the build-up pressure in the slot die is much greater than the slit die, and imbibition rate can be significant increased and reducing the required time to reach the complete saturation. In general the required saturation time of the slot die coating can be greatly shorted to one tenth of the dip coating required.
To analyze operating conditions effect on the coating width and thickness, a 3-D model was constructed, and the simulation data were transformed in dimensionless groups. It was found that when the ratio of inertial force/viscous force (Reynold number) to viscous force/tension force (Capillary number) was smaller than 500 and 450 for numerical computation and experiment, respectively, the dimensionless width W* was less than one. This means the coating solution can not completely cover the width of the slot die. This critical ratio can be used as a reference in scale-up production lines.
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author2 |
Yuan-Yuan Su |
author_facet |
Yuan-Yuan Su Li-Rong Chen 陳禮榮 |
author |
Li-Rong Chen 陳禮榮 |
spellingShingle |
Li-Rong Chen 陳禮榮 Investigating the Flow Behavior of Coating Solution in Porous Media for Die Coating Process |
author_sort |
Li-Rong Chen |
title |
Investigating the Flow Behavior of Coating Solution in Porous Media for Die Coating Process |
title_short |
Investigating the Flow Behavior of Coating Solution in Porous Media for Die Coating Process |
title_full |
Investigating the Flow Behavior of Coating Solution in Porous Media for Die Coating Process |
title_fullStr |
Investigating the Flow Behavior of Coating Solution in Porous Media for Die Coating Process |
title_full_unstemmed |
Investigating the Flow Behavior of Coating Solution in Porous Media for Die Coating Process |
title_sort |
investigating the flow behavior of coating solution in porous media for die coating process |
publishDate |
2014 |
url |
http://ndltd.ncl.edu.tw/handle/6898hk |
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